Change of Dye Bath for Sensitisation of Nanocrystalline Films: Enhances Performance of Dye-Sensitized Solar Cells

Abstract

The photovoltaic performance of the heterolepticH102 andHRD2 sensitizers was measured in DSSC and compared with that of reference N719 under similar fabrication and evaluation conditions. The Dye-Sensitised TiO2electrodes were prepared by staining the electrodes in ethanol bath and 1/1 v/v acetonitrile/tert-butanol (binary liquid) mixture bath separately and the DSSCs based on these sensitizers show that the change of dye bath from ethanol to the binary liquid mixture enhances the photocurrent action spectrum and solar-to-electricity conversion efficiencies, (η). Using ethanol for sensitisation of TiO2electrodes, the efficiencies obtained forH102,HRD2 and N719 are 4.31%, 4.62%, and 5.46%, respectively, while in binary liquid mixture bath, the corresponding values are enhanced to 5.89%, 4.87%, and 7.23%, respectively, under comparable conditions.

A molecularly engineered fluorene-substituted Ru-complex for efficient mesoscopic dye-sensitized solar cells

“…Thus fluorene unit as the core is known to display interesting chemical and electronic characteristics. In this application, we have been engaged in the synthesis of a durable and highly efficient new organic phthalocyanine as well as ruthenium(II) bipyridyl dyes in our laboratory [24,[28][29][30][31][32][33][34]. In addition, as part of our continued efforts, we have synthesized a new ruthenium(II) bipyridyl complex by introducing 4,4-bis(9,9-dibutyl-9H-fluorene-2-yl)- [2,2] bipyridine as an ancillary ligand, to which the influence of an increased conjugation length on photovoltaic performance and thermal stability was evaluated relative to the non-conjugated ancillary ligand 4,4 -dinonyl-2,2 -bipyridine present in the reference Z907 sensitizer.…”

A difluorenyl-carbo-cyclohexadiene: prospective chromophore for two-photon absorption

“…As previously devised for the carbo-benzenes 1a and 1b, C9dialkylated fluorenyl substituents were used with the view to ensure sufficient solubility of the carbo-cyclohexadiene target 3. The 2-bromo-9,9-dihexylfluorene 8 precursor was thus prepared from 2-bromofluorene according to a known procedure [17]. Two equivalents of the lithiated reagent of 8 were added to the dialdehyde 7, to give the corresponding diol 9,…”

A High Molar Extinction Coefficient Ru(II) Complex Functionalized withcis-Dithiocyanato-bis-(9-anthracenyl-10-(2-methyl-2-butenoic acid)-1,10-phenanthroline): Potential Sensitizer for Stable Dye-Sensitized Solar Cells

“…The major challenge of this emergent technology is to integrate each of the components into a highly efficient, single photonic device [8][9][10][11][12][13][14][15]. Recently, an order of magnitude increase in solar energy conversion efficiencies at dye-sensitized photoelectrochemical cells has been realized [16][17][18][19][20][21][22]. This breakthrough was accomplished by attaching ruthenium polypyridyl complexes to high surface area titanium dioxide, TiO 2, electrodes when operating as photoanodes in a photoelectrochemical cells; these materials efficiently convert visible light to electricity [23,24].…”